Re: [TCML] rotary gap disk

[FIFTYGUY@xxxxxxx]

In a message dated 11/29/08 1:31:15 P.M. Eastern Standard Time,  
evp@xxxxxxxxxxx writes:

>    There have been countless discussions like this in  past times and I 
always wonder why guys >don't use what, at least to me,  seems the obvious and 
almost certainly cheapest choice.  That is a  >metal disk with insulating hub of 
almost any material since the tensile  stress will all be in the metal >and 
the hub will remain  cool. 

    These are definitely advantages, but I suspect the  fiberglass laminate 
has a significant rigidity/mass advantage. I guess if you  used enough metal 
you wouldn't care, but you would be storing even more energy  in the spinning 
disk. Just a caveat.
    The other problem with a metal disk/ring is that it  limits the number of 
rotating break points to just two. By insulating each  electrode, you can 
have as many simultaneously approaching/departing gaps as you  have electrodes 
(times two). This has the same effect as increasing the  effective radius or RPM 
of the rotor, without having to actually do so. Also  breaks the gap into 
more sections without having to resort to using fixed  multiple gaps.
    Those advantages, of course, are of arguable  importance...
 
-Phil LaBudde

Center for the Advanced Study of Ballistic  Improbabilities
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